Mechanical movement



Nov. 25, 1930. w. C. ,DENHAM 1,782,888

MECHANICAL MOVEMENT Filed Jan. 18, 1929 r a Sheets-Sheet 1 j a'j, e7:

Inventor I Nov. 25; 1930.

w. DENHAM MECHANICAL MOVEMENT Filed Jan. 18, 1929 5 Sheets-Sheet 2 gan";

III/II/III/I/Il/ i In venior 2 27152722 diam/zazia Nov. 25, 1930. w. c.DENHAM 1. 38

MECHANICAL MOVEMENT Filed Jan. 18, 1929 :5 Shts-Sheet 5 A tiorn eyPatented-Nov. 25, 1 93( I i i i UNITED STATES PATENT OFFICE) H wrnnmnrc. nEnHAm or gnfifiBIllRG, runners n i i i i r MEoHANIoALMovEnEENTyApplication filed January 18, ess. serial 11 ,333,438,

The present invention relates generally to as'at 12. A series ofthreaded recesses 14 mechanical movement and more particularly isprovided in the "rim 8. A crank 15 is fixed to a device or assembly forovercoming dead onf-the. shaft 6 and has a series of threaded "centersin engines, and other rotary devices. recesses '16. 1

5 An important object of the invention re- An arcuate-memberconcentricwith the 55 sides in the provision'of a mechanism of this pivot 11 isdenoted by the 'numeral17 and nature which will throwthe pivot offsetconis detachably fixed by screws 18 engaged in nection of a connectingrod with a rotary aperturesl l and 16 with'therim 8" and the member offcenter. crank 15 respectively: A pairof stop collars 10 Another veryimportant object of the in- 19 aremounted on the arcuate member 17 and60 vention resides in the provision of a mechmay beheld in differentadjusted positions anism of this nature which is simple in conby meansof set screws 20. 1 One collar is dis struction, strong and durable,adjustable, posed to each sideof thebar- 1O 'and limit thoroughlyefficient and reliable in use and the swinging movementof this bar 10.

operation, andotherwise well adapted'to the If desired this bar 10 maybe of any suit- 65 purpose for which it is designed. able length or itmay be of angular construc- With the above and numerous other objects11011 as is shown atlO in Figure 4. i 1 in view as will appear as thedescription pro- 7 From the abovedetailed description it will ceeds, theinvention resides in certain novel "be seen that when the connectingrodisin 1 features of construction, and in combination operation and en-center and is pushed, the 17 and arrangement of parts as will behereinbar 10 'is swung so as to abut the collar 19 after more fullydescribed and claimed. closer tothfi fi n by placing the In the drawing:7 pin 112-jofli center so that the wheel or "disk Figure 1 is a sideelevation of a mechanism 7 and the shaft 6 will readily turn in the 2embodying the features of my invention. proper direction and just thereversewould 7.5 Figure 2 is a top plan view thereof, occur shouldthepinbe' on the outside of Figure 3is a sectional view taken substantheshaft and a pull be required as will be;

tially on the line 33 of Figure 1, quite apparent. Thebar. 10would'beswung Figure A'isa perspective view of another i-nthenopposite directiontoward the other 3o embodiment ofbar used in this mechanism, collar, 1 1V a a g Figure 5dis a detail section taken substain The series ofapertures- 14: and 16 and the tially. on the line 55 of Figure 1,adjustability of the co1lars 19v accommodate a.

Figure 6 is a perspective view ofthe bar large range of adjustmentswhich may be de- 7 shown in the assembly of Figure 1. 5 sired: indifferent machinery andunder dif- Figure? is a side elevation of another'emferentlcircumstancesas will be quite apparent. s5,

bodiment of the invention showing portions InFigure 7 Ihavefdisclosed,anotherar-v of the section, I V rangement wherein thenumeralg30 ,denotes,

Figure 8 is atop plan view thereof; a driven shaft with. a disk 31 fixedthereto Figure 9 is a sectional view taken substanhaving a rim 32.

i i 4L? tially on the line 9- 9 of Figure 7. A block 33 is adjnstablymounted Referring to the drawing in detail and-parrim by means ofscrewbfl in slot, 3,5, :A spri 1 ticularly the embodiment of theinvention Slis mduhtled atone end ofthis block disclosed inFigures 1 to6 inclusive it; will functions as a bufiier a's will be @PPM'QQF l a beseen that numeral 5 denotes. a reci'procatlaterinthe description, A bar39 ispivotja'l 1 a5 ing connecting rod, numeral-6 a driven shaft mountedas atflandhas one end 11 with a wheel or disk 7 keyed thereto and" tablewith the buffer spring 37andfrorn an formed witharim 8. a a vintermediateportiono thebar thereprojects A lug" 9 projects inwardlyfromthe rim an arm42 passing throughna slack 43 formed anda bar 10is pivotedthereto as at 11. The in the rim 32.

5drod 5 is pivotally engaged with the bar 10 ,A plate44 ismounted on thearm42 and" 1w i held against the rim by means of a spring to maintainthe slot 48 closed. A pin 46 projects from an intermediate portion ofthe arm throu h an arcuate slot 47 in the disk 31 so as to limit themovement of this bar.

A connecting rod or pitman rod 49 is pivotally engaged as at 50 with theouter end of the arm 42. When this pitman rod 49 is moved upwardly itwill be seen that the bar 39 is swung to abut the end 41 with the spring37 to urge the disk in a clockwise direction. Equalizing springs 51 areanchored in the disk and to the lever 39 as at 52. hen the pitman getsin a position with its pivot 50 on center a forward pressure is exertedby the buffer spring so as to overcome the inefficiency of the offcenter position.

This forward pressure on the Wrist pin produces a positive and smoothrotation. The entire assembly has a push and pull, most effectivelyarranged and entirely absent in the ordinary construction.

It is thought that the construction, operation, utility and advantagesof this invention will now be quite apparent to those skilled in thisart without a more detailed description thereof.

The present embodiments of the invention have been disclosed inconsiderable detail merely for the purposes of exemplification since inactual practice they attain the features of advantage enumerated asdesirable in the statement of the invention and the above description.

It will be apparent that changes in the details of construction, and inthe combination and arrangement of parts may be resorted to withoutdeparting from the spirit or scope of the invention as hereinafterclaimed or sacrificing any of its advantages.

Having thus described my invention, What I claim as new is:

1. A mechanical movement including a rotary member, a pitman, a barpivotally engaged at one end to an off center point of the rotary memberand extending tangentially thereto, a pitman, a wrist pin connecting thepitman with the other end of the bar, an arcuate member, means formounting an arcuate member on the rotary member across the bar, stopcollars on the arcuate member one to each side of the bar to limit themovement thereof, means for adjusting the arcuate member.

2. A mechanical movement including a rotary member, a pitman, a barpivotally engaged at one end to an off center point of the rotary memberand extending tangentially thereto, a pitman, a wrist pin connecting thepitman with the other end of the bar, an arouate member, means formounting an arcuate member on the rotary member across the bar, stopcollars on the arcuate member one to each side of the bar to limit themovement thereof,

In testimony whereof I afiix my signature.

lVILLIAM C. DENHAM.

